Railroad switch machine
US9889867B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 2015 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | Aug 3, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L5/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A railroad switch machine includes a pair of switch blades, an electric motor mechanically coupled to the pair of switch blades, a pair of input terminals connected to a DC power supply for receiving a power signal and a regulator to adapt the power signal between the input terminals into a motor current applied to the electric motor. The regulator includes a plurality of switches connected between the pair of input terminals and two phases of the electric motor. The switches are transistors and the regulator also includes a controller adapted to drive each transistor with a respective command signal to adjust a value and a direction of an intensity of the motor current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.